{"id":12890,"date":"2025-09-24T10:57:05","date_gmt":"2025-09-24T09:57:05","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12890"},"modified":"2026-01-14T04:24:01","modified_gmt":"2026-01-14T04:24:01","slug":"composition-of-blood-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/24\/composition-of-blood-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Composition of blood Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">1. Blood is a ___________.<\/mark><\/strong><br>A) Muscle tissue<br>B) Connective tissue<br>C) Nervous tissue<br>D) Epithelial tissue<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Blood is a fluid connective tissue that circulates nutrients and wastes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">2. What percentage of human body weight is blood?<br><\/mark><\/strong>A) 2\u20133%<br>B) 7\u20138%<br>C) 12\u201315%<br>D) 20%<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   In an adult, blood accounts for about 7\u20138% of body weight.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">3. The average volume of blood in a healthy adult is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 2\u20133 liters<br>B) 4\u20136 liters<br>C) 7\u20138 liters<br>D) 9\u201310 liters<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Adult humans normally have 4\u20136 liters of blood.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">4. Blood consists of plasma and<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Water only<br>B) Corpuscles (cells)<br>C) Enzymes only<br>D) Salts only<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Blood = plasma (55%) + cells (45%).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">5. Plasma forms about what percentage of blood?<br><\/mark><\/strong>A) 25%<br>B) 45%<br>C) 55%<br>D) 75%<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Plasma makes up the liquid portion, about 55% of blood.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">6. The main component of plasma is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Proteins<br>B) Water<br>C) Salts<br>D) Hormones<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Plasma is ~90\u201392% water.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">7. Which proteins are abundant in plasma?<br><\/mark><\/strong>A) Albumin, globulin, fibrinogen<br>B) Myosin, actin<br>C) Hemoglobin, myoglobin<br>D) Collagen, elastin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Plasma proteins perform transport, defense, and clotting functions.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">8. The most abundant plasma protein is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Albumin<br>B) Globulin<br>C) Fibrinogen<br>D) Hemoglobin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Albumin maintains osmotic balance and regulates fluid movement.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">9. Which plasma protein helps in blood clotting?<br><\/mark><\/strong>A) Albumin<br>B) Globulin<br>C) Fibrinogen<br>D) Insulin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Fibrinogen converts into fibrin threads during clot formation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">10. Globulins in plasma function mainly as<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Hormones<br>B) Enzymes<br>C) Antibodies<br>D) Transport pigments<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Globulins act as immunoglobulins for defense against infections.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">11. Which plasma component transports hormones and nutrients?<br><\/mark><\/strong>A) Water<br>B) Albumin<br>C) Globulins<br>D) Plasma itself<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Plasma carries glucose, amino acids, lipids, hormones, and waste.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">12. Serum is plasma without<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Water<br>B) Proteins<br>C) Fibrinogen<br>D) Salts<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Serum = plasma \u2212 clotting factors (fibrinogen).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">13. Normal pH of blood is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 6.8<br>B) 7.0<br>C) 7.4<br>D) 8.0<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Blood is slightly alkaline (7.35\u20137.45).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">14. Which gas is transported mainly dissolved in plasma as bicarbonate ions?<br><\/mark><\/strong>A) Oxygen<br>B) Carbon dioxide<br>C) Nitrogen<br>D) Helium<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  ~70% of CO\u2082 is transported as bicarbonates in plasma.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">15. Which mineral in plasma is essential for blood clotting?<br><\/mark><\/strong>A) Sodium<br>B) Potassium<br>C) Calcium<br>D) Iron<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>   Ca\u00b2\u207a is necessary for activation of clotting factors.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">16. Which waste product is transported in plasma to kidneys?<br><\/mark><\/strong>A) Hemoglobin<br>B) Urea<br>C) Myosin<br>D) Collagen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Urea is the main nitrogenous waste transported by plasma.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">17. Which plasma lipoprotein is called \u201cbad cholesterol\u201d?<br><\/mark><\/strong>A) HDL<br>B) LDL<br>C) VLDL<br>D) Chylomicrons<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Low-Density Lipoprotein (LDL) deposits cholesterol in arteries.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">18. Which plasma lipoprotein is called \u201cgood cholesterol\u201d?<br><\/mark><\/strong>A) HDL<br>B) LDL<br>C) VLDL<br>D) Chylomicrons<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  High-Density Lipoprotein removes cholesterol from tissues to liver.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">19. Plasma helps maintain<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Osmotic balance<br>B) Acid-base balance<br>C) Temperature regulation<br>D) All of the above<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Plasma maintains homeostasis in the body.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">20. Plasma makes up what percentage of total body water?<br><\/mark><\/strong>A) 10%<br>B) 25%<br>C) 55%<br>D) 70%<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Plasma holds about one-fourth of total body water.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">21. The anticoagulant present naturally in blood is <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Fibrinogen<br>B) Heparin<br>C) Prothrombin<br>D) Thrombin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Heparin prevents clotting inside blood vessels.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">22. Which organ synthesizes most plasma proteins?<br><\/mark><\/strong>A) Kidney<br>B) Liver<br>C) Pancreas<br>D) Spleen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Albumin, fibrinogen, and most globulins are made in the liver.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">23. Which component gives straw-yellow color to plasma?<br><\/mark><\/strong>A) Urochrome<br>B) Bilirubin<br>C) Hemoglobin<br>D) Carotene<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Bilirubin (from hemoglobin breakdown) gives plasma its pale yellow color.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">24. What percentage of blood is formed elements (cells)?<br><\/mark><\/strong>A) 25%<br>B) 35%<br>C) 45%<br>D) 55%<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Blood contains ~45% cells (RBCs, WBCs, platelets).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">25. Hematocrit refers to <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Percentage of plasma<br>B) Percentage of RBCs in blood<br>C) Percentage of WBCs<br>D) Amount of hemoglobin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hematocrit (packed cell volume) is normally ~45%.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">26. Red blood cells (RBCs) are also called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukocytes<br>B) Thrombocytes<br>C) Erythrocytes<br>D) Lymphocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>   RBCs are scientifically called erythrocytes, derived from Greek erythros (red).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">27. The main function of RBCs is <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Blood clotting<br>B) Transport of oxygen<br>C) Production of hormones<br>D) Immunity<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hemoglobin in RBCs carries oxygen to tissues.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">28. Average number of RBCs per cubic mm of blood in men is about <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 2\u20133 million<br>B) 4\u20135 million<br>C) 5\u20136 million<br>D) 8\u20139 million<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Adult males have ~5\u20136 million RBCs per cubic mm.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">29. Average number of RBCs per cubic mm of blood in women is about<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 2\u20133 million<br>B) 3.5\u20134.5 million<br>C) 5\u20136 million<br>D) 7\u20138 million<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   Women have slightly fewer RBCs than men.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">30. The average lifespan of a human RBC is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 30 days<br>B) 60 days<br>C) 120 days<br>D) 200 days<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  RBCs circulate for about 120 days before being destroyed in spleen\/liver.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">31. Which organ destroys old RBCs?<br><\/mark><\/strong>A) Kidney<br>B) Liver<br>C) Spleen<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  The spleen is called the \u201cgraveyard of RBCs.\u201d\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">32. Which organ produces most RBCs in adults?<br><\/mark><\/strong>A) Liver<br>B) Bone marrow<br>C) Spleen<br>D) Kidney<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Red bone marrow produces RBCs, WBCs, and platelets.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">33. In the fetus, RBCs are mainly formed in the<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Kidney<br>B) Liver and spleen<br>C) Brain<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  During fetal development, RBCs are produced by liver and spleen.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">34. Which protein pigment gives RBCs their red color?<br><\/mark><\/strong>A) Myoglobin<br>B) Hemoglobin<br>C) Globulin<br>D) Albumin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hemoglobin is a red iron-containing pigment in RBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">35. Each hemoglobin molecule contains<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 2 iron atoms<br>B) 4 iron atoms<br>C) 6 iron atoms<br>D) 8 iron atoms<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hemoglobin has 4 heme groups, each with one Fe\u00b2\u207a atom.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">36. One gram of hemoglobin can carry about<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 0.5 ml oxygen<br>B) 1.34 ml oxygen<br>C) 2.0 ml oxygen<br>D) 3.0 ml oxygen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hemoglobin binds ~1.34 ml oxygen per gram.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">37. The normal hemoglobin content in men is about<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 8\u201310 g\/dl<br>B) 10\u201312 g\/dl<br>C) 13\u201318 g\/dl<br>D) 20\u201322 g\/dl<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Normal male hemoglobin is ~13\u201318 g\/dl of blood.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">38. The normal hemoglobin content in women is about<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 10\u201312 g\/dl<br>B) 12\u201316 g\/dl<br>C) 16\u201320 g\/dl<br>D) 20\u201324 g\/dl<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Females have slightly lower hemoglobin than males.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">39. Which vitamin is essential for RBC formation?<br><\/mark><\/strong>A) Vitamin A<br>B) Vitamin B12<br>C) Vitamin C<br>D) Vitamin D<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Vitamin B12 (cobalamin) is essential for erythropoiesis.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">40. Which mineral is most essential for hemoglobin synthesis?<br><\/mark><\/strong>A) Calcium<br>B) Iron<br>C) Magnesium<br>D) Zinc<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Iron forms the central atom of heme, binding oxygen.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">41. Deficiency of iron in diet causes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukemia<br>B) Anemia<br>C) Hemophilia<br>D) Polycythemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Iron deficiency reduces hemoglobin, causing anemia.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">42. Deficiency of Vitamin B12 causes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Sickle cell anemia<br>B) Pernicious anemia<br>C) Aplastic anemia<br>D) Hemophilia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   Lack of Vitamin B12 impairs RBC maturation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">43. Abnormal sickle-shaped RBCs occur in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukemia<br>b) Thalassemia<br>C) Sickle cell anemia<br>D) Hemophilia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Genetic mutation produces abnormal hemoglobin S \u2192 sickle-shaped RBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">44. Polycythemia is a condition of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Excess RBCs<br>B) Low RBCs<br>C) No WBCs<br>D) Low platelets<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Polycythemia causes abnormally high RBC count, increasing blood viscosity.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">45. Mature RBCs in humans lack<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) Mitochondria only<br>B) Nucleus only<br>C) Both nucleus and mitochondria<br>D) Cell membrane<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Lack of nucleus and mitochondria allows more space for hemoglobin.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">46. Average diameter of a human RBC is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">___________.<\/mark><\/strong><br><\/mark><\/strong>A) 2\u20133 \u00b5m<br>B) 5\u20136 \u00b5m<br>C) 7\u20138 \u00b5m<br>D) 10\u201312 \u00b5m<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Human RBCs are ~7.2 \u00b5m in diameter.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">47. The shape of human RBC is ___________.<br><\/mark><\/strong>A) Spherical<br>B) Oval<br>C) Biconcave disc<br>D) Flat sheet<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Biconcave shape increases surface area for gas exchange.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">48. The hormone that stimulates RBC production is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Insulin<br>B) Erythropoietin<br>C) Adrenaline<br>D) Thyroxine<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Erythropoietin (from kidneys) stimulates bone marrow to produce RBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">49. Which organ secretes erythropoietin?<br><\/mark><\/strong>A) Liver<br>B) Kidney<br>C) Spleen<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Kidneys sense low oxygen and release erythropoietin.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">50. The condition of abnormally low RBC count is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukopenia<br>B) Anemia<br>C) Thrombocytopenia<br>D) Leukemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Anemia results from insufficient RBCs or hemoglobin.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">51. White blood cells (WBCs) are also called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Erythrocytes<br>B) Thrombocytes<br>C) Leukocytes<br>D) Lymphocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  WBCs (leukocytes) defend the body against infections.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">52. The average number of WBCs per cubic mm of blood is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) 500\u20131,000<br>B) 1,000\u20132,000<br>C) 5,000\u201310,000<br>D) 50,000\u2013100,000<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Normal adult blood contains 5,000\u201310,000 WBCs per cubic mm.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">53. The lifespan of WBCs is usually<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Few hours to few days<br>B) 120 days<br>C) Several months<br>D) Several years<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Most WBCs live only a few hours to days, except some memory lymphocytes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">54. WBCs are formed mainly in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Kidney<br>B) Bone marrow and lymph nodes<br>C) Spleen only<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Bone marrow produces most WBCs; lymphoid tissues (lymph nodes, spleen) help in maturation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">55. Which type of WBCs are most abundant?<br><\/mark><\/strong>A) Eosinophils<br>B) Basophils<br>C) Neutrophils<br>D) Lymphocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Neutrophils (60\u201370% of WBCs) fight bacterial infections.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">56. Which WBCs are called \u201csoldiers of the body\u201d?<br><\/mark><\/strong>A) Lymphocytes<br>B) Neutrophils<br>C) Monocytes<br>D) Basophils<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Neutrophils engulf bacteria by phagocytosis.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">57. Which WBCs produce antibodies?<br><\/mark><\/strong>A) Monocytes<br>B) Lymphocytes (B-cells)<br>C) Neutrophils<br>D) Eosinophils<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  B lymphocytes produce antibodies for immune defense.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">58. T-lymphocytes are mainly involved in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Blood clotting<br>B) Cell-mediated immunity<br>C) Oxygen transport<br>D) Antibody production<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  T-cells attack virus-infected and cancer cells.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">59. Which WBCs are called \u201cscavengers of the body\u201d?<br><\/mark><\/strong>A) Neutrophils<br>B) Basophils<br>C) Monocytes<br>D) Eosinophils<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Monocytes engulf dead cells and pathogens.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">60. Which WBCs are responsible for allergic reactions?<br><\/mark><\/strong>A) Neutrophils<br>B) Basophils<br>C) Monocytes<br>D) Lymphocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Basophils release histamine and heparin during allergy and inflammation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">61. Which WBCs are active against parasitic infections?<br><\/mark><\/strong>A) Eosinophils<br>B) Basophils<br>C) Lymphocytes<br>D) Monocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Eosinophils fight parasites and mediate allergic responses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">62. A rise in eosinophil count indicates<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Bacterial infection<br>B) Parasitic infection or allergy<br>C) Viral infection<br>D) Cancer<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  High eosinophil count signals parasitic disease or allergic condition.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">63. A rise in lymphocyte count is seen in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Viral infections<br>B) Bacterial infections<br>C) Fungal infections<br>D) Allergy<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Lymphocytosis is common in viral diseases like measles and mumps.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">64. Which WBCs secrete histamine and heparin?<br><\/mark><\/strong>A) Monocytes<br>B) Basophils<br>C) Neutrophils<br>D) Eosinophils<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Basophils release histamine (inflammation) and heparin (anticoagulant).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">65. The largest WBCs are<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Neutrophils<br>B) Lymphocytes<br>C) Monocytes<br>D) Eosinophils<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Monocytes are the largest WBCs and transform into macrophages.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">66. Platelets are also called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukocytes<br>B) Thrombocytes<br>C) Lymphocytes<br>D) Erythrocytes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Platelets (thrombocytes) are fragments of megakaryocytes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">67. Average platelet count per cubic mm of blood is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) 10,000\u201320,000<br>B) 50,000\u2013100,000<br>C) 1\u20132 lakh<br>D) 1\u20132 million<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Normal platelet count is 1.5\u20134.5 lakhs per cubic mm.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">68. The lifespan of platelets is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) 5\u20139 days<br>B) 10\u201320 days<br>C) 30 days<br>D) 120 days<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Platelets survive about a week in circulation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">69. Platelets are produced in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Kidney<br>B) Liver<br>C) Bone marrow<br>D) Spleen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Platelets are formed in red bone marrow from megakaryocytes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">70. Main function of platelets is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Transport of oxygen<br>B) Blood clotting<br>C) Immunity<br>D) Hormone transport<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Platelets release clotting factors initiating coagulation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">71. Which vitamin is essential for platelet function in clotting?<br><\/mark><\/strong>A) Vitamin A<br>B) Vitamin B12<br>C) Vitamin C<br>D) Vitamin K<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Vitamin K helps synthesize prothrombin, crucial for clotting.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">72. Deficiency of platelets is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukopenia<br>B) Anemia<br>C) Thrombocytopenia<br>D) Leukocytosis<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Thrombocytopenia causes bleeding tendency due to low platelet count.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">73. Which disease is caused by failure of blood to clot due to absence of clotting factors?<br><\/mark><\/strong>A) Leukemia<br>B) Hemophilia<br>C) Anemia<br>D) Thrombocytosis<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hemophilia is a genetic disorder where clotting factor VIII\/IX is absent.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">74. The disease of uncontrolled abnormal increase in WBCs is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Anemia<br>B) Leukemia<br>C) Hemophilia<br>D) Polycythemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   Leukemia is called blood cancer, due to uncontrolled WBC production.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">75. Which organ stores and destroys platelets?<br><\/mark><\/strong>A) Kidney<br>B) Liver<br>C) Spleen<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  The spleen acts as a reservoir for platelets and destroys old ones.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">76. The ABO blood group system was discovered by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Landsteiner<br>B) Harvey<br>C) Pavlov<br>D) Malpighi<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Karl Landsteiner discovered ABO blood groups in 1901.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">77. Which antigen is present in blood group A?<br><\/mark><\/strong>A) Antigen B<br>B) Antigen A<br>C) Antigen AB<br>D) No antigen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Blood group A has antigen A on RBCs and anti-B antibody in plasma.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">78. Which antibodies are present in blood group B?<br><\/mark><\/strong>A) Anti-A<br>B) Anti-B<br>C) Anti-AB<br>D) No antibody<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Blood group B has antigen B and anti-A antibodies.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">79. Which blood group has no antibodies in plasma?<br><\/mark><\/strong>A) A<br>B) B<br>C) O<br>D) AB<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  AB blood group has both antigens but no antibodies \u2192 universal recipient.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">80. Which blood group has no antigens on RBCs?<br><\/mark><\/strong>A) A<br>B) B<br>C) O<br>D) AB<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>   O blood group lacks both A and B antigens but has anti-A and anti-B antibodies.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">81. Universal donor blood group is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) A+<br>B) AB+<br>C) O\u2212<br>D) AB\u2212<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  O\u2212 has no A, B, or Rh antigens, hence universal donor.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">82. Universal recipient blood group is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) A+<br>B) AB+<br>C) O+<br>D) B+<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  AB+ has all antigens, hence can receive from all groups.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">83. The Rh factor was discovered in<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Rabbits<br>B) Rhesus monkeys<br>C) Rats<br>D) Horses<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Rh factor was first observed in rhesus monkeys.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">84. The most common blood group in India is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) A<br>B) B<br>C) O<br>D) AB<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>   O group is most common in Indian population.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">85. Blood clotting normally occurs in about<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) 10\u201315 seconds<br>B) 3\u20136 minutes<br>C) 20\u201330 minutes<br>D) 1 hour<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Normal clotting time is ~5 minutes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">86. The enzyme that converts fibrinogen into fibrin is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Thrombin<br>B) Prothrombin<br>C) Plasmin<br>D) Pepsin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Thrombin is the active enzyme that forms insoluble fibrin threads.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">87. Prothrombin is converted to thrombin in presence of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Calcium ions<br>B) Vitamin K<br>C) Platelet factors<br>D) All of the above<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Conversion of prothrombin requires Ca\u00b2\u207a, vitamin K, and platelet factors.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">88. Which vitamin deficiency leads to delayed clotting?<br><\/mark><\/strong>A) Vitamin A<br>B) Vitamin B12<br>C) Vitamin K<br>D) Vitamin D<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Vitamin K is essential for synthesis of prothrombin.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">89. Natural anticoagulant in blood is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Thrombin<br>B) Heparin<br>C) Prothrombin<br>D) Fibrinogen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Heparin prevents unwanted intravascular clotting.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">90. The condition of low platelet count is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Anemia<br>B) Leukopenia<br>C) Thrombocytopenia<br>D) Leukocytosis<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Low platelets increase bleeding tendency.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">91. Hemophilia is caused by deficiency of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Hemoglobin<br>B) RBCs<br>C) Clotting factors (Factor VIII or IX)<br>D) WBCs<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Hemophilia is a genetic disease with defective clotting proteins.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">92. Which type of genetic disease is hemophilia?<br><\/mark><\/strong>A) Autosomal dominant<br>B) Autosomal recessive<br>C) X-linked recessive<br>D) Y-linked dominant<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>   Hemophilia is inherited through the X chromosome.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">93. Which blood disorder is also called \u201cblood cancer\u201d?<br><\/mark><\/strong>A) Hemophilia<br>B) Leukemia<br>C) Thrombocytopenia<br>D) Sickle cell anemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Leukemia is uncontrolled proliferation of abnormal WBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">94. The disease caused by abnormally shaped RBCs is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Thalassemia<br>B) Leukemia<br>C) Hemophilia<br>D) Sickle cell anemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  A genetic defect in hemoglobin causes sickle-shaped RBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">95. Thalassemia is a disorder of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Platelets<br>B) Hemoglobin synthesis<br>C) WBCs<br>D) Plasma proteins<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Thalassemia is an inherited defect in globin chain formation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">96. Excess breakdown of RBCs leads to<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Jaundice<br>B) Anemia<br>C) Polycythemia<br>D) Leukemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>   Excess bilirubin from RBC breakdown causes yellowing of skin and eyes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">97. Which organ is known as \u201cgraveyard of RBCs\u201d?<br><\/mark><\/strong>A) Kidney<br>B) Liver<br>C) Spleen<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Spleen destroys old and worn-out RBCs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">98. Which blood test is used to measure hemoglobin?<br><\/mark><\/strong>A) Lipid profile<br>B) CBC (Complete Blood Count)<br>C) ESR<br>D) BUN<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  CBC test estimates hemoglobin, RBC count, WBC count, and platelets.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">99. The medical term for increased WBC count is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Leukopenia<br>B) Leukocytosis<br>C) Thrombocytosis<br>D) Polycythemia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Leukocytosis is a rise in WBC count due to infections.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">100. Blood transfusion is safest when<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"> ___________.<\/mark><\/strong><br><\/mark><\/strong>A) Blood group is matched<br>B) Donor is healthy<br>C) Cross-matching is done<br>D) All of the above<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Compatibility tests (ABO, Rh), donor health, and cross-matching are essential for safe transfusion.\n <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. Blood is a ___________.A) Muscle tissueB) Connective tissueC) Nervous tissueD) Epithelial tissue Show Answer Answer: B Explanation: Blood is a fluid connective tissue that circulates nutrients and wastes. 2. What percentage of human body weight is blood?A) 2\u20133%B) 7\u20138%C) 12\u201315%D) 20% Show Answer Answer: B Explanation: In an adult, blood accounts for about 7\u20138%<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[16348,16151,16133,16155,16154,16147,16158,16139,16234,16341,16297,16343,16342,16350,16347,16346,16135,16336,16337,16295,16289,16345,4029,16156,5649,5623,16344,15880,16338,16134,16339,16132,16349,16140,16340],"class_list":{"0":"post-12890","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-biology","7":"tag-anemia","8":"tag-biology-learning","9":"tag-biology-mcqs","10":"tag-biology-preparation-material","11":"tag-biology-questions-and-answers","12":"tag-biology-quiz","13":"tag-biology-revision","14":"tag-biology-study-material","15":"tag-blood-circulation","16":"tag-blood-clotting","17":"tag-blood-components","18":"tag-blood-disorders","19":"tag-blood-functions","20":"tag-blood-groups","21":"tag-blood-physiology","22":"tag-carbon-dioxide-transport","23":"tag-competitive-exam-biology","24":"tag-composition-of-blood","25":"tag-hemoglobin","26":"tag-human-circulatory-system","27":"tag-immunity","28":"tag-leukemia","29":"tag-mcqs-adda","30":"tag-mcqs-for-biology-exam","31":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","32":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","33":"tag-oxygen-transport","34":"tag-plasma","35":"tag-platelets","36":"tag-psc-biology-mcqs","37":"tag-red-blood-cells","38":"tag-ssc-biology-mcqs","39":"tag-thrombocytopenia","40":"tag-upsc-biology-mcqs","41":"tag-white-blood-cells"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12890"}],"version-history":[{"count":106,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12890\/revisions"}],"predecessor-version":[{"id":36743,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12890\/revisions\/36743"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}